一辆农用运输车,其转向器为循环球式,啮合部件为扇齿与齿条,转向轴压配在齿条杆上。一次在更换转向轴后装复试车,发现机车左、右转向角都变小,转向盘转到底时,前轮向右只能偏转约20°,向左只能偏转约10°(正常偏转角左右各为21°),转向十分困难;另外,转向盘的转总圈数只有1.2圈(正常为3.5圈)。拆卸发现,转向器装配时未将齿条与扇齿对中,这样在向一侧转向转向盘时,扇 A farm truck, the steering gear for the recirculating ball, meshing parts for the fan teeth and rack, the steering shaft press-fit on the rack bar. Once the steering shaft was replaced, the test vehicle was installed and found that the left and right steering angles of the locomotive became smaller. When the steering wheel turned to the end, the front wheels could only deflect rightward by about 20 ° to the right and about 10 ° to the left (normal yaw angle Left and right for each 21 °), steering is very difficult; In addition, the steering wheel turnaround is only 1.2 laps (normal 3.5 laps). Disassembly found that the steering gear is not assembled with the rack gear teeth, so that the steering wheel to the side, the fan